package cn.lookup.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor4Target implements HandlerInterceptor {
    //在目标方法执行之前执行
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("在目标方法执行之前执行");
        String need = request.getParameter("need");
        if("yes".equals(need)){
            return true;
        }else{
            request.getRequestDispatcher("/jsp/fail.jsp").forward(request,response);
            return false;
        }
    }
    //在目标方法执行之后，视图返回之前执行
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("在目标方法执行之后，视图返回之前执行");
        modelAndView.addObject("msg","reset-msg");
    }
    //视图返回之后
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("视图返回之后");
    }
}
